[Rd] RFC: adding an 'exact' argument to [[

Seth Falcon sfalcon at fhcrc.org
Wed May 23 01:07:42 CEST 2007

Hi again,

Robert has committed the proposed patch to R-devel.  So [[ now has an
'exact' argument and the behavior is as described:

Seth Falcon <sfalcon at fhcrc.org> writes:
>    1. [[ gains an 'exact' argument with default value NA
>    2. Behavior of 'exact' argument:
>       exact=NA
>           partial matching is performed as usual, however, a warning
>           will be issued when a partial match occurs.  This is the
>           default.
>       exact=TRUE
>           no partial matching is performed.
>       exact=FALSE
>           partial matching is allowed and no warning issued if it
>           occurs.

+ seth

Seth Falcon | Computational Biology | Fred Hutchinson Cancer Research Center

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